JP2010179676A - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the flexibility of adjustment of the drawn position of a seat belt webbing which is drawn to the shoulder part of a sitting occupant. <P>SOLUTION: In this seat belt device 10, the band-like seat belt webbing 11 (hereafter, referred to as a webbing 11) which restrains the body of the sitting occupant to a vehicle seat 1 is diagonally applied and attached to the sitting occupant from the shoulder part to the waist part. By the engagement with the webbing 11, a guide 26 guides the webbing to the drawn position of the webbing 11 on the shoulder part of the sitting occupant. An adjustment mechanism 30 is connected to the guide 26, and adjusts the drawn position of the webbing 11 obtained through the guide by the guide 26 by moving the guide 26. The drawn position of the webbing 11 obtained through the guide by the guide 26 can be adjusted by the adjustment mechanism 30 in both the shoulder width direction and the longitudinal direction of the sitting occupant. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat belt device. More specifically, the present invention relates to a seat belt device in which a belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat is attached to the seat occupant from the shoulder to the waist.

  2. Description of the Related Art Conventionally, in a vehicle seat, there is a vehicle seat that can adjust the pull-out position of the seat belt webbing that is pulled out from the shoulder portion of the seat back in accordance with the difference in the physique of the seated passenger. Here, the following Patent Document 1 discloses a technique that allows the above-described seat belt webbing drawing position to be adjusted in the lateral width direction at the shoulder portion of the seat back.

JP 2000-280861 A

  However, just by adjusting the seat belt webbing pullout position in the width direction as in the prior art described above, the degree of freedom of adjustment is low, and the optimal position that matches the pullout position of the webbing to the size of the seated occupant Could not be adjusted.

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is to increase the degree of freedom in adjusting the pull-out position of the seat belt webbing pulled out to the shoulder of the seated occupant. There is.

In order to solve the above problems, the seat belt device of the present invention takes the following means.
First, the first invention is a seat belt device in which a belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat is slung from the shoulder to the waist of the seated occupant. Yes, having a guide and an adjusting mechanism. The guide guides a pull-out position where the seat belt webbing is pulled out to the shoulder of the seated occupant by engagement with the seat belt webbing. The adjustment mechanism is connected to the guide, and adjusts the pull-out position of the seat belt webbing by the guide by moving the guide. With this adjustment mechanism, the position of the seat belt webbing pulled out by the guide can be adjusted in the shoulder width direction and the front-rear direction of the seated occupant.

  According to the first aspect of the present invention, the seat belt webbing is guided by the guide that is moved and operated by the adjusting mechanism at the pull-out position where the seat belt webbing is pulled out to the shoulder portion of the seated passenger. The movement operation of the guide by this adjusting mechanism is performed so as to adjust the pull-out position of the seat belt webbing in the shoulder width direction and the front-rear direction of the seated occupant. Therefore, the pull-out position of the seat belt webbing can be adjusted with a high degree of freedom over the shoulder width direction and the front-rear direction of the seated occupant.

  Next, according to a second aspect, in the first aspect described above, the seat belt webbing is moved forward from the suspended position before the seat belt webbing is attached to the body of the seated occupant by the guide moving operation structure by the adjusting mechanism. It is operated and transferred to a position where the seated occupant can easily reach.

  According to the second aspect of the present invention, the seat belt webbing is moved from the suspended position before being attached to the body of the seated occupant to the front side by the guide moving operation structure by the adjusting mechanism. It is transported to an easily accessible position. As described above, a structure that combines the mechanism for adjusting the pull-out position of the seat belt webbing and the mechanism for assisting the pull-out operation of the seat belt webbing can be obtained by the operation structure of the adjustment mechanism.

1 is a perspective view illustrating a schematic configuration of a seat belt device according to a first embodiment. It is a perspective view showing the state which moved and operated the seatbelt webbing to the front side. It is the perspective view showing the state where the seatbelt webbing was put over the body of the seated occupant. It is the schematic diagram which represented the state by which the guide was moved to the position of the outermost side of the extrusion member in an initial position by planar view. It is the schematic diagram which represented the state which moved and operated the seatbelt webbing to the front side by planar view. It is the schematic diagram which represented the state by which the guide was moved to the position of the innermost side of the extrusion member in an initial position by planar view.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the structure of the seatbelt apparatus 10 of Example 1 is demonstrated using FIGS. As shown in FIG. 3, the seat belt device 10 of the present embodiment is configured as an occupant restraint device that restrains the body of a seated occupant to the vehicle seat 1. Here, the vehicle seat 1 is disposed as a second-row seat behind the driver seat of the right-hand drive vehicle, and includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, And a headrest 4 serving as a receiver.

  On the other hand, as shown in FIG. 1, a seat belt device 10 includes a belt-like seat belt webbing 11 (hereinafter abbreviated as webbing 11) serving as a restraining belt, and a retractor (not shown) serving as a winding device for the webbing 11. ), A tongue 12 serving as a mounting bracket passed through the webbing 11, a buckle 13 fixedly installed on a side portion of the seat cushion 3 as a mounting tool of the tongue 12, and a hand of a seated occupant when the webbing 11 is mounted The belt reacher mechanism 20 moves to a position on the front side that is easy to reach (see FIG. 2), and a lateral movement mechanism 30 that moves and adjusts the drawing position of the webbing 11 in the belt reacher mechanism 20. Here, a moving mechanism constituted by a combination of the belt reacher mechanism 20 and the lateral moving mechanism 30 corresponds to the adjusting mechanism of the present invention.

  Specifically, the tongue 12 is formed of a convex-shaped metal plate, and a long hole 12B serving as a through hole for the webbing 11 is formed through the root portion thereof. A mounting portion 12A that is engaged with and locked to the buckle 13 by being inserted into an insertion port 13A formed in the buckle 13 is formed at the tip of the metal plate (see FIG. 3). The engagement lock state of the tongue 12 with respect to the buckle 13 is released by an operation of pushing a release button 13B provided on the buckle 13.

  Next, returning to FIG. 1, the webbing 11 will be described. That is, the webbing 11 is formed by knitting a polyester fiber excellent in tensile strength into a band shape, and is wound around a retractor (not shown). The end of the webbing 11 drawn out from the retractor is drawn out from the outlet 2A formed in the shoulder opening on the outer side of the seat back 2, and the belt surface is then drawn from the back surface of the seat back 2. The lower end of the seat cushion 3 is fastened and fixed to the outer side portion of the seat cushion 3.

  The webbing 11 described above is always urged in the direction of being wound by a retractor (not shown), and is held in a tensioned state in which tension is always applied by the urging force. The webbing 11 is formed by the passenger seated on the vehicle seat 1 grasping the tongue 12 passed through the webbing 11 and pulling it toward the inner side, and inserting the mounting portion 12A of the tongue 12 into the buckle 13 and mounting it. The belt surface is held in a state where it is hung on the chest or waist of the seated occupant (see FIG. 3).

  As a result, the webbing 11 is held in a restrained state by pressing the chest and waist of the seated occupant against the seat back 2 by the tension in the winding direction applied by the retractor (not shown). Here, as shown in FIG. 1, the tongue 12 described above is engaged by a stopper 11 </ b> A provided on the webbing 11 at the initial stage before mounting when the webbing 11 is suspended along the backrest surface of the seat back 2. It is in a state where it is stopped and hung at a certain height position where the seated crew can easily reach.

  Next, the configuration of the belt leecher mechanism 20 will be described with reference to FIGS. The belt reacher mechanism 20 is disposed at the front portion of the outlet 2A formed in the shoulder opening of the seat back 2 described above, and the belt surface of the webbing 11 fed forward from the outlet 2A is provided. By pressing from the back side, the webbing 11 is moved to the front side. The belt leecher mechanism 20 includes a main body member 21 serving as a support base, a pushing member 22 that pushes the webbing 11 forward, an operating member 23 that moves the pushing member 22, and a moving operation that operates the operating member 23. And a guide 26 for guiding the drawing position of the webbing 11 provided on the pushing member 22.

  Specifically, the main body member 21 is integrally coupled and fixed to a skeleton frame of the seat back 2 (not shown). The main body member 21 is provided with support pins 21A and 21B that are inserted into and installed in a long hole 22C formed in the pushing member 22 described later and a long hole 23A formed in the operation member 23, respectively. Yes. Next, as shown in FIG. 4, the pushing member 22 is formed in a curved arm shape as a whole, and is formed on the front side of the lower side of the figure from the rear outlet 2 </ b> A described above. A horizontally long slit 22B through which the fed webbing 11 can pass forward is formed.

  The front surface portion 22A in which the slit 22B is formed is formed in a shape that is smoothly curved toward the front and outside so that the front surface conforms to the shape of a body part such as a shoulder portion of a seated occupant. Thereby, 22 A of front parts can come in contact softly with respect to body parts, such as a shoulder part of a seated passenger. As shown in FIG. 4, an elongated hole 22 </ b> C that is curved along the curved shape of the arm is formed in the arm-shaped portion of the pushing member 22 so as to penetrate in the plate thickness direction.

  A support pin 21A having a circular cross section provided on the main body member 21 is inserted into and installed in the long hole 22C. The support pin 21A is rotatable and slidable with respect to the long hole 22C. It is supposed to be in a state. The pushing member 22 is pivotally supported by the connecting shaft 25 so as to be rotatable with respect to the operating member 23 at the upper right end in the figure, which is the rear end of the arm shape.

  As a result, as shown in FIG. 5, the pusher member 22 is moved and operated in the front-outward direction (lower left direction in the figure) in accordance with the drive rotation of the pinion gear 24 described later. The main body member 21 is moved forward with respect to the main body member 21 while being pushed out by the operation member 23. Specifically, when the pushing member 22 is pushed by the operation member 23, the moving direction thereof is guided by the support pin 21A inserted into the elongated hole 22C.

  As a result, the pushing member 22 is pushed forward while accompanying a rotational movement so that the front surface portion 22A is directed toward the inward side where the seated occupant sits. By this movement, the pushing member 22 pushes the webbing 11 forward of the seated occupant's hand while pushing the belt surface of the webbing 11 passed through the slit 22B of the front part 22A described above to the front side. Move to the side position. Here, a guide 26 capable of guiding the drawing position of the webbing 11 passed through the slit 22B is mounted on the front surface portion 22A of the pushing member 22 described above.

  As can be seen with reference to FIGS. 4 and 6, the guide 26 is connected to a lateral movement mechanism 30 to be described later, and is moved into the curved shape of the front surface portion 22 </ b> A by being moved by the lateral movement mechanism 30. Are to be transported along. The guide 26 is formed in a U-shape having standing walls on both the left and right sides. By inserting the webbing 11 into the U-shaped space, the webbing 11 is sandwiched by the standing walls on both sides, and the webbing 11 is configured to restrict movement in the band width direction.

  Next, returning to FIG. 4, the operation member 23 will be described. The operation member 23 is formed in an arm shape that extends straight in a diagonally downward left direction, which is the front outer direction of the vehicle seat 1. The arm-shaped portion of the operation member 23 is formed with a long hole 23A that extends straight along the direction in which the arm shape extends, penetrating in the plate thickness direction. In the long hole 23A, a support pin 21B having a circular cross section provided in the main body member 21 is inserted and mounted. The support pin 21B is rotatable and slidable with respect to the long hole 23A. It is considered possible.

  In the operation member 23 described above, rack teeth 23B are cut along the extending direction of the arm shape on the upper left surface portion in the figure, which is the rear side surface of the arm shape. The rack teeth 23 </ b> B mesh with a pinion gear 24 that is rotatably supported by the main body member 21. Here, the pinion gear 24 is rotatably supported on the main body member 21 by a rotating shaft 24A, and is switched to ON / OFF or switched to forward / reverse rotation by drive control of a driving device (not shown). It has come to be.

  When the pinion gear 24 is rotated from the state shown in FIG. 4 in the clockwise direction, the operation member 23 described above moves straightly in the direction in which the arm shape extends in response to the transmission of the rotational force from the pinion gear 24. Operated (see FIG. 5). Specifically, the operation member 23 is supported by the support pin 21B inserted into the long hole 23A, so that the operation member 23 is moved and operated straight in the above-described direction by receiving power transmission from the pinion gear 24. It has become.

  As a result, the pushing member 22 connected to the operation member 23 is pushed in the moving direction of the operation member 23, and the rotational movement with respect to the operation member 23 about the connection shaft 25 and the support pin 21A are centered. The main body member 21 is moved in a manner that is pushed forward while being accompanied by a rotational movement with respect to the main body member 21.

  Next, the lateral movement mechanism 30 will be described with reference to FIGS. As shown in FIG. 4, the lateral movement mechanism 30 is provided on the pushing member 22, and adjusts the slide position of the guide 26 that is slidable with respect to the front surface portion 22 </ b> A. It has a working structure. Specifically, the lateral movement mechanism 30 includes a tension spring 31 that moves and urges the guide 26 toward the right side in the drawing with respect to the front surface portion 22A, and a bias of the tension spring 31 described above. And an operation cable 32 that is operated so as to be pulled outward (left side in the drawing).

  As shown in the drawing, the operation cable 32 has one end connected to the guide 26 and the other end connected to an electrically driven winding device (not shown). This winding device (not shown) detects that the tongue 12 has been attached to the buckle 13 by a detection means (not shown) provided on the buckle 13 (see FIG. 1) described above, and sends a signal to that effect. In response, the winding amount of the operation cable 32 is adjusted so that the guide 26 can be moved to a position that matches the physique of the seated occupant.

  Specifically, as shown in FIG. 4, the above-described winding device (not shown) always winds the operation cable 32 to the maximum and pushes the guide 26 before the seated occupant sits on the vehicle seat 1. The moving member 22 is moved to the position on the outermost side (the left side in the drawing) of the front surface portion 22A. The winding device receives a detection signal from a detection means (not shown) for detecting the physique of the seated occupant provided at a site such as the headrest 4 when the occupant is seated on the vehicle seat 1 and operates. It operates to loosen the amount of winding of the cable 32, and moves the guide 26 to a position suitable for the size of the seated occupant detected by the detecting means.

  Thereby, as shown in FIG. 6, the guide 26 is inward (right side in the drawing) with respect to the front surface portion 22 </ b> A by the amount of movement of the operation cable 32 by the biasing force of the tension spring 31. It is moved to. FIG. 6 shows a state in which the guide 26 is moved to the innermost position with respect to the front surface portion 22A. The movement position of the guide 26 is determined by the operation of the winding device. It can be stopped at an appropriate position according to the physique.

  By the way, the pulling-out position of the webbing 11 by the guide 26 described above can be changed by changing the front / rear position of the pushing member 22 by the operation of the belt reacher mechanism 20. Specifically, for example, as illustrated in FIG. 5, the pulling position of the webbing 11 by the guide 26 is simply moved forward by moving the pushing member 22 forward. Also, from this state, the guide 26 is moved inwardly (to the right in the figure) toward the neck of the seated occupant by the lateral movement mechanism 30, so that the webbing 11 is pulled out by the guide 26 on the rear side. And it is moved inward.

  Thus, the pulling position of the webbing 11 by the guide 26 is adjusted in the shoulder width direction of the seated occupant (the lateral width direction of the vehicle seat) by the operating mechanism (adjustment mechanism) configured by the combination of the belt reacher mechanism 20 and the lateral movement mechanism 30. ) And various movement adjustments in the front-rear direction. Specifically, in the belt reacher mechanism 20, a driving device (not shown) for driving and rotating the pinion gear 24 serving as a driving source thereof detects a occupant's physique as shown in the drawing device (not shown). The driving operation is also performed by receiving a detection signal from (omitted), and in cooperation with the winding device, the guide 26 is driven so as to be moved to a position more suitable for the physique of the seated occupant. It is designed to be operated.

  Then, the usage method of a present Example is demonstrated. That is, as shown in FIG. 1, the belt reacher mechanism 20 is always held in an initial state (see FIG. 4) before pushing the webbing 11 forward, before the occupant is seated on the vehicle seat 1. Yes. The belt reacher mechanism 20 is configured such that when the occupant is seated on the vehicle seat 1, the pinion gear 24 described above with reference to FIG. The driving operation is performed, and the pushing member 22 is pushed out forward.

  At this time, the guide 26 is held at the outermost position in the front surface portion 22 </ b> A of the pushing member 22. Accordingly, the webbing 11 passed through the guide 26 is pushed forward more greatly with the forward movement accompanied by the rotational movement of the pusher member 22, and the belt surface thereof is moved inward to the seated occupant. Directed. As a result, the tongue 12 locked to the webbing 11 is also directed toward the inward side where the seated occupant sits. Therefore, the tongue 12 transferred to a position where the seated occupant can easily reach the hand can be easily grasped. .

  Next, when the seated occupant attaches the tongue 12 to the buckle 13, the attachment state of the tongue 12 is detected by the detection means provided on the buckle 13, and subsequently, the belt reacher mechanism 20 is detected based on this detection signal. Then, the lateral movement mechanism 30 is actuated and the guide 26 is moved in the shoulder width direction and the front-rear direction of the seated occupant, so that the drawing position of the webbing 11 is moved to the optimum position that matches the physique of the seated occupant.

  As described above, according to the seat belt device 10 of the present embodiment, the guide 26 that guides the drawing position of the webbing 11 is adjusted by the adjustment mechanism configured by the combination of the belt reacher mechanism 20 and the lateral movement mechanism 30. It is designed to move in the shoulder width direction and the front-back direction. Therefore, the drawing position of the webbing 11 guided by the guide 26 can be adjusted with a high degree of freedom over the shoulder width direction and the front-rear direction of the seated occupant.

  The three-member link connection structure of the pusher member 22, the operation member 23, and the main body member 21 constituting the belt reacher mechanism 20 includes a rotation link mechanism and a slider link mechanism. The slide movement direction of the member 23 is set laterally (outward) with respect to the front direction in which the webbing 11 is moved. Then, the lateral movement amount by the slider link mechanism is converted into the forward movement amount by which the webbing 11 is moved by the rotation link mechanism of the push member 22, and the push member 22 is moved forward.

  As described above, since the slide movement direction of the operation member 23 is set to the horizontal direction, the width in the front-rear direction can be kept small even if a large slide movement amount is secured. Even if the slide movement direction is set to the horizontal direction in this way, the amount of movement in the horizontal direction is converted to the front direction in which the webbing 11 is moved by the rotation link mechanism, and the webbing 11 is efficiently moved forward by the pushing member 22. Can be moved to the side.

  In addition, since the operation member 23 is configured to slide forward and laterally laterally (outward) with respect to the main body member 21, the push member 22 can be more efficiently operated with respect to the slide movement amount of the operation member 23. It can be moved forward greatly. In addition, the pusher member 22 is retracted in the outward direction in which the entire shape moves away from the seated occupant by the movement of the operation member 23 being slid forward while being accompanied by a rotational motion. Thereby, even when an occupant with a large physique sits down, the pushing member 22 can be made difficult to get in the way. Moreover, the guide 26 can be moved more widely in the shoulder width direction of the seated occupant by the above-described operation structure.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, although the configuration in which the seat belt webbing 11 is pulled out from the shoulder portion of the seat back 2 is illustrated, the seat belt webbing 11 may be pulled out from an interior panel such as a pillar portion on the side of the vehicle body. Good. The guide 26 guides the position of the seat belt webbing 11 regardless of whether the position of the seat belt webbing 11 is set at the shoulder of the seat back 2 or the interior panel of the vehicle body such as the pillar. The adjustment mechanism (the belt reacher mechanism 20 and the lateral movement mechanism 30) may also be provided on a member on the vehicle body side such as a pillar portion.

  The adjustment mechanism may be configured to move the guide in the shoulder width direction and the front-rear direction of the seated occupant by a combination of simple linear motion mechanisms.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2A Drawer 3 Seat cushion 4 Headrest 10 Seat belt device 11 Seat belt webbing 11A Stopper 12 Tang 12A Mounting part 12B Long hole 13 Buckle 13A Insertion port 13B Release button 20 Belt reacher mechanism 21 Main body member 21A Support pin 21B Support pin 22 Pushing member 22A Front part 22B Slit 22C Long hole 23 Operation member 23A Long hole 23B Rack tooth 24 Pinion gear 24A Rotating shaft 25 Connecting shaft 26 Guide 30 Adjustment mechanism 31 Tension spring 32 Operation cable

Claims (2)

A belt-like seat belt webbing that restrains the body of a seated occupant to a vehicle seat is attached to the seat occupant by being obliquely hung from the shoulder to the waist,
A guide for guiding a pull-out position where the seat belt webbing is pulled out to a shoulder of a seated occupant by engagement with the seat belt webbing;
An adjustment mechanism that is connected to the guide and adjusts a drawing position of the seat belt webbing by the guide by moving the guide;
A seatbelt device, wherein the adjustment mechanism allows the seatbelt webbing pull-out position by the guide to be adjusted in the shoulder width direction and the front-rear direction of the seated occupant, respectively. The seat belt device according to claim 1,
Due to the movement operation structure of the guide by the adjustment mechanism, the seat belt webbing is moved from the suspended position before being attached to the body of the seated occupant to the front side, so that the seat occupant can easily reach the position. A seat belt device which is adapted to be transported.

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